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I just recieved Acoustic revive 1.0 SP USB cable, this cable has two type A plugs, one for data, one for DC power, my Legato USB-SPDIF converter has it's own power, so I thought that I only need to plug in the data cable into my MacBook pro, wrong! Legato was not recognized by computer, unless I plug both cable into computer, as MacBook has only two USB input, I was forced to use an USB hub for extra input for hard drive, this is weird, anyone know why?
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Have you found a quality cable that's A to A?
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Music. Window or mirror?
Strange, but the DAC's USB input is type A.
But I am going to get a female B to Male A adapter. I know I'll lose some resolution but it's got to be better than using thin-wired, made for cell phones USB cords.
I can buy a quality USB cable and use it with the adapter.
Sorry about not answering sooner, the world's been a bit crazy lately.
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Music. Window or mirror?
You might want to ask the manufacturer if the USB input is capable of streaming (that's what a computer connection would be in this case) or just file reading (the usual protocol for an A-type USB connection), for example: USB flash drives, portable music players, etc.
"Sorry about not answering sooner, the world's been a bit crazy lately."
No problem at all.
Does the A-type USB input accept input from a computer? Usually the A-type is for USB flash drives or portable players and the B-type is from computers.
It has to do with the computer either needing to see activity on the + or - side of the USB power connection to recognize that something is there. I'm pretty sure you can plug in both ends (the "data" USB and the "power" USB) so that the computer recognizes there's a connection (the DAC shows up) and then unplug the "power" end.
There are computers that will recognize a "data" line without a "power" line. It seems Apple's computers want to see the "power" line.
Tried that, did not work, as soon as I unplugged power cable, music stopped. My old USB cable,which is a single custom made without power wire connected by Pat of Analog Research Technologies did not have this problem.
Do a search in Computer Audio for posts by chopper87@aol.com (his questions started the discussion). I believe the discussion was in mid to late 2011 and it concerned his DIY USB Y-cable and its use with a MAC Mini.
Thank you Joe for your effort to help me!
If the special USB cable that Pat (no longer) supplies with his Legato worked for you, why change it?
I believe there is a company or two that manufactures USB cables without the power leg (don't know if they include the ground leg or not). You might want to ask Pat about this or read some of the threads that appeared right before he released the Legato. It wasn't here at AA though: it was on another audio forum (can't think of the name right now, but if I come across it I'll let you know).
I know that Markertek will custom manufacture just about any cable you could think of -- and not rip you off, so that may be an option for you.
Thanks for the suggestion. Now I just use an USB hub, things worked out fine, just not sure if hub will affect the sound.
Acoustic Revive USB cable made Legato sounded 3 to 5 times better.
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